"I fear for the future," said Van Gogh's mother, choking with emotion at the ceremony on Tuesday.

Only about 150 people were allowed to attend, but hundreds of mourners outside the crematorium watched the ceremony on giant screens. It was also broadcast on Dutch NOS public television.

Mosques in several Dutch cities have been the targets of vandalism and failed arson attempts since the killing.

The mayor of Eindhoven ordered extra security for mosques and schools following a bomb blast at an Islamic school which caused serious damage on Monday.

Police are also investigating two petrol bomb attacks on churches in Utrecht and Amersfoort, which caused minor damage early on Tuesday.

Muslim fears

Van Gogh was shot and stabbed to death as he cycled in broad daylight through an Amsterdam street.

Mourners watched the funeral on giant outdoor screens

Hundreds of people have left flowers, candles and notes at the spot where he died. They also left cactuses - a tribute to his prickly nature - and bottles of beer.

Several hundred Dutch-Moroccans rallied in a nearby park on Tuesday, many of them wearing orange T-shirts reading "We won't put up with extremism any more".

Muslim leaders say their communities fear further attacks.

After the pre-dawn explosion in Eindhoven, the southern city's mayor, Alexander Sakkers, said additional police patrols would give round-the-clock protection for all Muslim places of worship and education.

Ayhan Tonca, chairman of the Contact Group for Muslims and Government, has insisted that the government do more to protect Islamic sites, to stop fears rising.

Correspondents say that Van Gogh's killing and the violent response have
shocked many in the Netherlands.

"The Netherlands is a nation where people ought to want to meet one another, where cultures meet each other," Prime Minister Jan Peter Balkenende said on Dutch
television.